Funding for this research was provided by:
Overseas travel assistance program executed by TUAT president discretionary fund
Text and Data Mining valid from 2018-09-05
Accepted: 23 August 2018
First Online: 5 September 2018
Compliance with ethical standards
: The paper has not been submitted elsewhere for publication, in whole or in part.
: The authors declare that there is no conflict of interests regarding the publication of this paper.
: This paper does not contain studies on human or animal participants.